Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime.

A251841

Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum nonprime and every diagonal and antidiagonal sum prime.

Terms

    a(0) =872a(1) =1229a(2) =2890a(3) =5860a(4) =18708a(5) =48692a(6) =100973a(7) =328235a(8) =861182a(9) =1788541a(10) =5811485a(11) =15259891a(12) =31702266a(13) =102964722a(14) =270439630a(15) =561937573a(16) =1824434189a(17) =4793021422a(18) =9960951265a(19) =32328609957a(20) =84950562777a(21) =176575774214a(22) =572879745560

External references